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Pristidactylus nigroiugulus CEI, SCOLARO & VIDELA, 2001

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Higher TaxaLeiosauridae (Leiosaurinae), Iguania, Sauria, Squamata (lizards)
Subspecies 
Common NamesG: Halsband-Grosskopfleguan 
SynonymPristidactylus nigroiugulus CEI, SCOLARO & VIDELA 2001
Pristidactylus nigroigulus — CAMOUSSEIGT 2010 (in error)
Pristidactylus nigroiugulus —AVILA et al. 2010
Pristidactylus nigroiugulus — SCROCCHI et al. 2010: 77
Pristidactylus nigroingulus — PYRON & BURBRINK 2013
Pristidactylus nigroiugulus — FEMENIAS et al. 2019
Pristidactylus nigroigulus — FEMENIAS et al. 2019 (in error)
Pristidactylus nigroiugulus — CARVALHO et al. 2023 
DistributionArgentina (Río Negro and Chubut)

Type locality: Foothills of the Meseta de Sierra Negra, Telsen, 880 m elevation (Chubut, Argentina),  
Reproductionoviparous 
TypesHolotype: MACN 37092, adult male; paratypes: MACN, IBA-UNC, JMC-DC, MHNG, CH-IADIZA, JAS-DC 
DiagnosisDiagnosis: Pristidactylls nigroiugulus is unique within the genus in having a showy black gular spot in males as a secondary sexual character. Moreover, it differs from P. scapulatus in retaining the juvenile pattern in adult females; from P araucanus in having distinct morphological characters in both sexes, as a smaller head width at the masseteric region, and a major relative distance between nostril and anterior corner of the eye, when compared with the distance between nostril and tip of the snout; from P. achalensis in having the crowns of the posterior marginal teeth tapered with small cusps, not with flared crowns, strongly compressed, with larger anterior and posterior cusps as in P achalensis; from P. casuhatiensis in having smooth subdigital scales and a very different chromatic pattern in both sexes; from P fasciatus in having smooth subdigital scales and a very different tail:body ratio, with the tail length in P. fasciatus less than the snout-vent distance. (Cei et al. 2001)


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Comment 
EtymologyFrom the Latin niger or nigrum for "black" or "deep dark," and iugulus or iugulum for "throat." Thus, it means "black throat," the most distinctive feature of the lizard. 
References
  • Aigo, Juana; Ana Ladio, Jorgelina M. Boretto, Facundo Cabezas-Cartes, and Nora R. Ibargüengoytía 2020. The Relationship Between People and Lizards in Patagonia. In: Morando & Avila (eds.), Lizards of Patagonia. Springer Nature, pp. 25-42 - get paper here
  • Avila, Luciano J.; Andrea González Marín, Jaime Troncoso-Palacios, Kevin Imanol Sánchez, Cristian Hernán Fulvio Pérez, and Mariana Morando 2020. Naming the Diversity: Taxonomy of Current Species of Patagonian Lizards. In: Morando & Avila (eds.), Lizards of Patagonia. Springer Nature, pp. 123-188 - get paper here
  • Avila, Luciano Javier and Mariana Morando 2003. New records and natural history notes for Pristidactylus nigroiugulus Cei, Scolaro & Videla, 2001 from Río Negro and Chubut provinces, Argentina. Herpetozoa 16 (1/2):83-86 - get paper here
  • AVILA, LUCIANO JAVIER; LORENA ELIZABETH MARTINEZ & MARIANA MORANDO 2013. Checklist of lizards and amphisbaenians of Argentina: an update. Zootaxa 3616 (3): 201–238 - get paper here
  • Camousseigt, B. 2010. Ein Schutzprojekt für den Valeria-Großkopfleguan, Pristidactylus valeriae – mit Unterstützung der REPTILIA. Reptilia (Münster) 15 (85): 52-58 - get paper here
  • Carvalho, André L. G.; Alejandro Laspiur, Julia Klaczko, Luis Rolando Rivas, Miguel Trefaut Rodrigues, Marco Aurélio de Sena & Ricardo Céspedes 2023. Total evidence phylogenetic analysis of Leiosauridae (Squamata) with focus on the ‘para-anoles’ and description of a new Urostrophus species from the Bolivian Andes. Systematics and Biodiversity, 21:1, 2200306, - get paper here
  • Cei, J. M., J. A. SCOLARO & F. VIDELA 2001. The present status of Argentinean polychrotid species of the genus Pristidactylus and description of its southernmost taxon as a new species. Journal of Herpetology 35 (4): 597-605 - get paper here
  • Cei, J.M. 2003. SPECIFIC SUPRAOCULAR SCUTELLATION PATTERNS AS SIGNIFICANT DIAGNOSTIC CHARACTERS: A TAXONOMIC INTER- AND INTRAGENERIC "FINGER-PRINT" IN LACERTILIA. Facena 19: 129-135 - get paper here
  • Femenias, M. M., Avila, L. J., Sites, J. W. & Morando, M. 2019. The enigmatic Leiosaurae clade: Phylogeography, species delimitation, phylogeny and historical biogeography of its southernmost species. Mol. Phylogenet. Evol. 106725 (2019). doi: - get paper here
  • Minoli I, Morando M, Avila LJ 2015. Reptiles of Chubut province, Argentina: richness, diversity, conservation status and geographic distribution maps. ZooKeys 498: 103-126 - get paper here
  • Minoli, I., and L. J Avila. 2011. Squamata, Iguania, Leiosauridae, Pristidactylus nigroiugulus Cei, Scolaro and Videla, 2001: New records for Chubut province and geographic distribution. Check List 7 (4): 404-406 - get paper here
  • MINOLI, IGNACIO; LUCIANO JAVIER AVILA 2017. Conservation assessments in climate change scenarios: spatial perspectives for present and future in two Pristidactylus (Squamata: Leiosauridae) lizards from Argentina. Zootaxa 4237 (1) - get paper here
  • Perez, C.H.F.; N. Frutos; M. Kozykariski; M. Morando; D.R. Perez; L.J. Avila. 2011. Lizards of Rio Negro Province, northern Patagonia, Argentina. Check List 7 (3): 202-219 - get paper here
  • Pyron, R. Alexander; Frank T. Burbrink 2013. Early origin of viviparity and multiple reversions to oviparity in squamate reptiles. Ecology Letters 17 (1): 13–21 (published online 2013, in print 2014), DOI: 10.1111/ele.12168 - get paper here
  • Scrocchi, Gustavo J.; Cristian S. Abdala,Javier Nori, Hussam Zaher 2010. Reptiles de la provincia de Río Negro, Argentina. Fondo Ed. Rionegrino, 249 pp.
 
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